Sterling Hughes brings the share interface

lib/share.c

@@ -0,0 +1,169 @@
+/*****************************************************************************
+ *                                  _   _ ____  _     
+ *  Project                     ___| | | |  _ \| |    
+ *                             / __| | | | |_) | |    
+ *                            | (__| |_| |  _ <| |___ 
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * In order to be useful for every potential user, curl and libcurl are
+ * dual-licensed under the MPL and the MIT/X-derivate licenses.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the MPL or the MIT/X-derivate
+ * licenses. You may pick one of these licenses.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id$
+ *****************************************************************************/
+
+#include "setup.h"
+#include <stdlib.h>
+#include <curl/curl.h>
+#include "share.h"
+#include "urldata.h"
+
+/* The last #include file should be: */
+#ifdef MALLOCDEBUG
+#include "memdebug.h"
+#endif
+
+#define CURL_SHARE_SET_LOCKED(__share, __type) ((__share)->locked += (__type))
+#define CURL_SHARE_SET_UNLOCKED(__share, __type) ((__share)->locked -= (__type))
+
+#define CURL_SHARE_SET_USED(__share, __type) ((__share)->specifier += (__type))
+#define CURL_SHARE_SET_UNUSED(__share, __type) ((__share)->specifier -= (__type))
+#define CURL_SHARE_IS_USED(__share, __type) ((__share)->specifier & (__type))
+#define CURL_SHARE_IS_LOCKED(__share, __type) ((__share)->locked & (__type))
+
+#define CURL_SHARE_IS_DIRTY(__share) ((__share)->dirty)
+
+#define CURL_SHARE_GET(__handle) (((struct SessionHandle *) (__handle))->share)
+
+curl_share *
+curl_share_init (void)
+{
+  curl_share *share = (curl_share *) malloc (sizeof (curl_share));
+  if (share) {
+    memset (share, 0, sizeof (curl_share));
+  }
+
+  return share;
+}
+
+CURLcode 
+curl_share_setopt (curl_share *share, curl_lock_type option, int enable)
+{
+  if (CURL_SHARE_IS_DIRTY(share)) {
+    return CURLE_SHARE_IN_USE;
+  }
+
+  if (enable) {
+    CURL_SHARE_SET_USED (share, option);
+  }
+  else {
+    CURL_SHARE_SET_UNUSED (share, option);
+  }
+
+  return CURLE_OK;
+}
+
+CURLcode
+curl_share_set_lock_function (curl_share *share, curl_lock_function lock)
+{
+  if (CURL_SHARE_IS_DIRTY(share)) {
+    return CURLE_SHARE_IN_USE;
+  }
+
+  share->lockfunc = lock;
+  return CURLE_OK;
+}
+
+CURLcode
+curl_share_set_unlock_function (curl_share *share, curl_unlock_function unlock)
+{
+  if (CURL_SHARE_IS_DIRTY(share)) {
+    return CURLE_SHARE_IN_USE;
+  }
+
+  share->unlockfunc = unlock;
+  return CURLE_OK;
+}
+
+CURLcode
+curl_share_set_lock_data (curl_share *share, void *data) 
+{
+  if (CURL_SHARE_IS_DIRTY(share)) {
+    return CURLE_SHARE_IN_USE;
+  }
+
+  share->clientdata = data;
+  return CURLE_OK;
+}
+
+Curl_share_error 
+Curl_share_acquire_lock (CURL *handle, curl_lock_type type)
+{
+  curl_share *share = CURL_SHARE_GET (handle);
+  if (share == NULL) {
+    return SHARE_ERROR_INVALID;
+  }
+
+  if (! (share->specifier & type)) {
+    return SHARE_ERROR_NOT_REGISTERED;
+  }
+
+  if (CURL_SHARE_IS_LOCKED (share, type)) {
+    return SHARE_ERROR_OK;
+  }
+
+  share->lockfunc (handle, type, share->clientdata);
+  CURL_SHARE_SET_LOCKED (share, type);
+
+  return SHARE_ERROR_OK;
+}
+
+Curl_share_error 
+Curl_share_release_lock (CURL *handle, curl_lock_type type)
+{
+  curl_share *share = CURL_SHARE_GET(handle);
+  if (share == NULL) {
+    return SHARE_ERROR_INVALID;
+  }
+
+  if (! (share->specifier & type)) {
+    return SHARE_ERROR_NOT_REGISTERED;
+  }
+
+  if (!CURL_SHARE_IS_LOCKED (share, type)) {
+    return SHARE_ERROR_OK;
+  }
+
+  share->unlockfunc (handle, type, share->clientdata);
+  CURL_SHARE_SET_UNLOCKED (share, type);
+
+  return SHARE_ERROR_OK;
+}
+
+CURLcode curl_share_destroy (curl_share *share)
+{
+  if (CURL_SHARE_IS_DIRTY(share)) {
+    return CURLE_SHARE_IN_USE;
+  }
+
+  free (share);
+  
+  return CURLE_OK;
+}
+
+/*
+ * local variables:
+ * eval: (load-file "../curl-mode.el")
+ * end:
+ * vim600: fdm=marker
+ * vim: et sw=2 ts=2 sts=2 tw=78
+ */